** Oil companies fall in extended trading after U.S. President Trump announced reciprocal tariffs

** Benchmark Brent crude LCOc1 falls 1.5% to $73.35 a barrel. Prices had first risen by a dollar, but later turned negative over the course of Trump's press conference

** Exxon Mobil XOM.N and Chevron CVX.N fall 1.5% and 2.1%, respectively

** Shares of APA Corp APA.O, Devon Energy DVN.N, Occidental Petroleum OXY.N and EOG Resources EOG.N fall between 1.2% and 1.8%

** EQT Corp EQT.N down 2.1%, Coterra Energy CTRA.N 2.1%, Diamondback Energy FANG.O 2.4% and Hess HES.N 3.9%

** Oilfield services providers Halliburton HAL.N falls 1.4%, Baker Hughes BKR.O and SLB SLB.N both down 2.7% each

** Refiners Valero Energy VLO.N and Marathon Petroleum MPC.N both drop 1.8%; HF Sinclair DINO.N falls 2.1% and Phillips 66 PSX.N 3.1%

** Pipeline operators ONEOK OKE.N and Kinder Morgan KMI.N drop 1.5% and ~1%, respectively

(Reporting by Vallari Srivastava in Bengaluru)

((Srivastava.Vallari@thomsonreuters.com))